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Numerical study of pin-fin cooling on gas turbine blades (2019)
Conference Proceeding
Effendy, M., Yao, Y., Sugati, D., & Tjahjono, T. (2019). Numerical study of pin-fin cooling on gas turbine blades. In Exploring resources, process and design for sustainable urban development: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018, (060022). https://doi.org/10.1063/1.5112493

This paper describes a numerical study of internal pin-fin cooling performance of a trailing-edge cutback configuration for gas turbine blade. The study was performed at two steps: first, to validate simulation results from an existing TE cutback coo... Read More about Numerical study of pin-fin cooling on gas turbine blades.

Influence of non-iterative time-advancement schemes on the aerodynamic prediction of pitching airfoils using dynamic mesh (2019)
Presentation / Conference
Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. (2019, June). Influence of non-iterative time-advancement schemes on the aerodynamic prediction of pitching airfoils using dynamic mesh. Paper presented at 8th International Symposium on Physics of Fluids (ISPF8)

A pitching airfoil problem is addressed in this paper to assess the use of a non-iterative time-advancement (NITA) scheme with dynamic mesh method, and also to estimate possible CPU time savings. Simulations have shown that using a combination of dyn... Read More about Influence of non-iterative time-advancement schemes on the aerodynamic prediction of pitching airfoils using dynamic mesh.

Flow response to rapid morphing flap deflection (2019)
Presentation / Conference
Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. (2019, March). Flow response to rapid morphing flap deflection. Paper presented at 54th 3AF International Conference on Applied Aerodynamics

Flow response to rapid morphing flap deflection is investigated at a Reynolds number based on chord of 0.62×10^6 for a 2D NACA 0012 airfoil fitted with a morphing Trailing-edge flap (TEF) at a range of angles of attack and morphing frequencies. T... Read More about Flow response to rapid morphing flap deflection.

Assessment of stress-blended eddy simulation model for accurate prediction of three-straight-bladed vertical axis wind turbine performance (2019)
Presentation / Conference
Syawitri, T. P., Yao, Y., Yao, J., & Chandra, B. (2019, March). Assessment of stress-blended eddy simulation model for accurate prediction of three-straight-bladed vertical axis wind turbine performance. Paper presented at 54th 3AF International Conference on Applied Aerodynamics

The performance of a three-straight-bladed vertical axis wind turbine at low tip speed ratio has been evaluated by detached eddy simulation (DES) with stress-blended eddy simulation (SBES) turbulence model. Two grid topologies around the blades, i.e.... Read More about Assessment of stress-blended eddy simulation model for accurate prediction of three-straight-bladed vertical axis wind turbine performance.

Flow separation control over a rounded ramp with spanwise alternating wall actuation (2019)
Journal Article
Ni, W., Lu, L., Fang, J., Moulinec, C., Emerson, D. R., & Yao, Y. (2019). Flow separation control over a rounded ramp with spanwise alternating wall actuation. Physics of Fluids, 31(1), 015101. https://doi.org/10.1063/1.5055948

An implicit large-eddy simulation is carried out to study turbulent boundary-layer separation from a backward-facing rounded ramp with active wall actuation control. This method, called spanwise alternating distributed strips control, is imposed onto... Read More about Flow separation control over a rounded ramp with spanwise alternating wall actuation.

Selecting nozzle arrangement of a chimney tower to reduce the temperature and to increase the entrainment mass flow (2018)
Journal Article
Sarjito, , Siswanto, W. A., Jamaldi, A., & Yao, Y. (2018). Selecting nozzle arrangement of a chimney tower to reduce the temperature and to increase the entrainment mass flow. https://doi.org/10.24247/ijmperddec20189

© TJPRC Pvt. Ltd. The aim of this research work was to find the best arrangement of nozzles inside the chimney tower to reduce the temperature and to increase the entrainment mass flow. An existing design of the nozzle arrangement was used as the ref... Read More about Selecting nozzle arrangement of a chimney tower to reduce the temperature and to increase the entrainment mass flow.

A review of current technical development in vertical axis wind turbine technologies and their braking system for low speed, urban and offshore areas application (2018)
Presentation / Conference
Syawitri, T., Yao, Y., & Chandra, B. (2018, October). A review of current technical development in vertical axis wind turbine technologies and their braking system for low speed, urban and offshore areas application. Paper presented at International Conference of Global Warming and Climate Change 2018

Recently, there are growing interests of using Vertical Axis Wind Turbine (VAWT) to harvest wind energy from low wind speed in urban areas to relatively high wind speed in offshore wind farms. Horizontal Axis Wind Turbine (HAWT) has been known to hav... Read More about A review of current technical development in vertical axis wind turbine technologies and their braking system for low speed, urban and offshore areas application.

CFD simulation of three-straight-bladed vertical axis wind turbine at low tip speed ratios (2018)
Presentation / Conference
Syawitri, T., Yao, Y., Chandra, B., & Yao, J. (2018, October). CFD simulation of three-straight-bladed vertical axis wind turbine at low tip speed ratios. Paper presented at International Conference of Global Warming and Climate Change 2018

This paper presents computational fluid dynamics (CFD) simulations of a three-straight-bladed Vertical Axis Wind Turbine (VAWT) operating at a wind speed of 9 m/s and low Tip Speed Ratio (TSR) ranging from 1.44 to 3.3. The turbine blade has NACA 0021... Read More about CFD simulation of three-straight-bladed vertical axis wind turbine at low tip speed ratios.

The influence of valve-pump weight ratios on the dynamic response of leaking valve-pump parallel control hydraulic systems (2018)
Journal Article
Ding, H., Zhao, J., Cheng, G., Wright, S., & Yao, Y. (2018). The influence of valve-pump weight ratios on the dynamic response of leaking valve-pump parallel control hydraulic systems. Applied Sciences, 8(7), https://doi.org/10.3390/app8071201

© 2018 by the authors. A new leaking valve-pump parallel control (LVPC) oil hydraulic system is proposed to improve the performance of dynamic response of present variable speed pump control (VSPC) system, which is an oil hydraulic control system wit... Read More about The influence of valve-pump weight ratios on the dynamic response of leaking valve-pump parallel control hydraulic systems.

Further development of a variable camber morphing mechanism using the direct control airfoil geometry concept (2018)
Presentation / Conference
Loudon, K., Bouferrouk, A., Coleman, B., Hughes, F., Lewis, B., Parsons, B., …Yao, Y. (2018, July). Further development of a variable camber morphing mechanism using the direct control airfoil geometry concept. Paper presented at International Symposium of Sustainable Aviation

This paper reports on the design, manufacture and testing of an improved variable camber morphing wing mechanism following the study by Evans et al. (2016), who employed the so-called Direct Control Airfoil Geometry (DCAG) concept to actuate the trai... Read More about Further development of a variable camber morphing mechanism using the direct control airfoil geometry concept.

Morphing airfoils analysis using dynamic meshing (2018)
Journal Article
Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. P. (2018). Morphing airfoils analysis using dynamic meshing. International Journal of Numerical Methods for Heat and Fluid Flow, 28(5), 1117-1133. https://doi.org/10.1108/HFF-06-2017-0261

© 2018, Emerald Publishing Limited. Purpose: The purpose of this paper is to use dynamic meshing to perform CFD analyses of a NACA 0012 airfoil fitted with a morphing trailing edge (TE) flap when it undergoes static and time-dependent morphing. The s... Read More about Morphing airfoils analysis using dynamic meshing.

Scalable generation of large-scale unstructured meshes by a novel domain decomposition approach (2018)
Journal Article
Chen, J., Xiao, Z., Zheng, Y., Zou, J., Zhao, D., & Yao, Y. (2018). Scalable generation of large-scale unstructured meshes by a novel domain decomposition approach. Advances in Engineering Software, 121, 131-146. https://doi.org/10.1016/j.advengsoft.2018.04.005

© 2018 Elsevier Ltd A parallel algorithm is proposed for scalable generation of large-scale tetrahedral meshes. The key innovation is the use of a mesh-simplification based domain decomposition approach. This approach works on a background mesh with... Read More about Scalable generation of large-scale unstructured meshes by a novel domain decomposition approach.

Aeroacoustics investigation of a harmonically morphing trailing edge flap (2018)
Presentation / Conference
Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. P. (2018, March). Aeroacoustics investigation of a harmonically morphing trailing edge flap. Paper presented at 53rd 3AF International Conference on Applied Aerodynamics

In this paper, an aeroacoustic study of a NACA 0012 airfoil fitted with a morphing Trailing Edge Flap (TEF) was performed at conditions of an Angle of Attack (AoA) = 4º, Reynolds number = 0.62×10^6 and Mach number = 0.11. A modified parametrization m... Read More about Aeroacoustics investigation of a harmonically morphing trailing edge flap.

Slat broadband noise prediction of multi-element 30P30N airfoil by a hybrid RANS-LES method (2018)
Presentation / Conference
Peng, T., Yao, Y., & Zhu, Q. (2018, March). Slat broadband noise prediction of multi-element 30P30N airfoil by a hybrid RANS-LES method. Paper presented at 53rd 3AF International Conference on Applied Aerodynamics

This paper presents a combined CFD and CAA study to assess the slat noise emissions from a multi-element 30P30N airfoil at the 5-degree and 8-degree angle of attack, using a hybrid RANS-LES method. In this simulation, the structured mesh is used and... Read More about Slat broadband noise prediction of multi-element 30P30N airfoil by a hybrid RANS-LES method.

Zeolite supported Pd electrocatalyst nanoparticle characterization (2018)
Journal Article
Yao, J., & Yao, Y. (2019). Zeolite supported Pd electrocatalyst nanoparticle characterization. International Journal of Hydrogen Energy, 44(1), 287-294. https://doi.org/10.1016/j.ijhydene.2018.02.110

© 2018 Hydrogen Energy Publications LLC A laboratory made 1.5 wt% Palladium (Pd) zeolite electrocatalyst is investigated using the Extended X-ray Adsorption Fine Structure (EXAFS) and Cyclic Voltammetry (CV) techniques to reveal Pd structure and resu... Read More about Zeolite supported Pd electrocatalyst nanoparticle characterization.

Unsteady 1-D thrust modeling with EOS effects for ram accelerator experiments at different bores (2018)
Journal Article
Knowlen, C., Bauer, P., Bengherbia, T., Yao, Y., Bruckner, A. P., & Giraud, M. (2018). Unsteady 1-D thrust modeling with EOS effects for ram accelerator experiments at different bores. https://doi.org/10.1007/BF03404761

Advances made to the unsteady, one-dimensional (1-D) modeling of the thermally choked ram accelerator thrust-Mach number characteristics include the use of real-gas equations of state to account for the compressibility effects of the combustion produ... Read More about Unsteady 1-D thrust modeling with EOS effects for ram accelerator experiments at different bores.

Analysis of a 3D unsteady morphing wing with seamless side-edge transition (2018)
Conference Proceeding
Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. P. (2018). Analysis of a 3D unsteady morphing wing with seamless side-edge transition. In 2018 Applied Aerodynamics Conferencehttps://doi.org/10.2514/6.2018-3178

© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. In this paper, a comparative study between a NACA 0012 rectangular wing with a statically morphed Trailing Edge Flap (TEF) and the same wing with a hinged flap... Read More about Analysis of a 3D unsteady morphing wing with seamless side-edge transition.

Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing (2018)
Conference Proceeding
Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. P. (2018). Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing. In 2018 Applied Aerodynamics Conferencehttps://doi.org/10.2514/6.2018-3813

© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. A numerical study of the NACA 0012 airfoil fitted with a harmonically morphing trailing edge flap (TEF) is performed at an angle of attack of 4º and a Reynolds... Read More about Aerodynamic analysis of a harmonically morphing flap using a hybrid turbulence model and dynamic meshing.

Large-Scale Streamwise Vortices in Turbulent Channel Flow Induced by Active Wall Actuations (2017)
Journal Article
Ni, W., Lu, L., Fang, J., Moulinec, C., & Yao, Y. (2018). Large-Scale Streamwise Vortices in Turbulent Channel Flow Induced by Active Wall Actuations. Flow, Turbulence and Combustion, 100(3), 651-673. https://doi.org/10.1007/s10494-017-9871-5

© 2017, Springer Science+Business Media B.V., part of Springer Nature. Direct numerical simulations of turbulent flow in a plane channel using spanwise alternatively distributed strips (SADS) are performed to investigate the characteristics of large-... Read More about Large-Scale Streamwise Vortices in Turbulent Channel Flow Induced by Active Wall Actuations.

Ensemble-Empirical-Mode-Decomposition based micro-Doppler signal separation and classification (2017)
Journal Article
Chen, H., Lin, P., Emrith, K., Narayan, P. P., & Yao, Y. (2017). Ensemble-Empirical-Mode-Decomposition based micro-Doppler signal separation and classification. International Journal of Computer Applications in Technology, 56(4), 253-263. https://doi.org/10.1504/IJCAT.2017.10009946

The target echo signals obtained by Synthetic Aperture Radar (SAR) and Ground Moving Target Indicator (GMTI platforms are mainly composed of two parts, the micro-Doppler signal and the target body part signal. The wheeled vehicle and the track vehicl... Read More about Ensemble-Empirical-Mode-Decomposition based micro-Doppler signal separation and classification.